dhcp

- Dynamic Host Configuration Protocol

Description

Dynamic Host Configuration Protocol (DHCP) enables host systems in a TCP/IP network
to be configured automatically for the network as they boot. DHCP uses
a client/server mechanism: servers store configuration information for clients, and provide that information
upon a client's request. The information can include the client's IP address
and information about network services available to the client.

This manual page provides a brief summary of the Solaris DHCP implementation.

Solaris DHCP Client

The Solaris DHCP client is implemented as background daemon, dhcpagent(1M).

For IPv4, this daemon is started automatically during bootup if there exists
at least one dhcp.interface file in /etc. Only interfaces with a corresponding
/etc/dhcp.interface file are automatically configured during boot.

For IPv6, this daemon is started automatically when commanded by in.ndpd (based
on IPv6 Routing Advertisement messages). No /etc/dhcp.interface file is necessary, but such
a file can be used to specify an interface as “primary,” provided that
IPv4 DHCP is also in use.

Network parameters needed for system configuration during bootup are extracted from the
information received by the daemon through the use of the dhcpinfo(1) command. The
daemon's default behavior can be altered by changing the tunables in the
/etc/default/dhcpagent file. The daemon is controlled by the ifconfig(1M) utility. Check the
status of the daemon using the netstat(1M) and ifconfig(1M) commands.

Solaris DHCP Server

The Solaris DHCP server is implemented as a background daemon, in.dhcpd(1M). This
daemon can deliver network configuration information to either BOOTP or DHCP clients. The
Solaris DHCP service can be managed using the dhcpmgr(1M) GUI or the
command line utilities dhcpconfig(1M), dhtadm(1M), and pntadm(1M).

DHCP Configuration Tables

The Solaris DHCP server stores client configuration information in the following two
types of tables:

dhcptab tables

Contain macros and options (also known as symbols), used to construct a package of configuration information to send to each DHCP client. There exists only one dhcptab for the DHCP service. The dhcptab(4) can be viewed and modified using the dhtadm(1M) command or dhcpmgr(1M) graphical utility. See dhcptab(4) for more information about the syntax of dhcptab records. See dhcp_inittab(4) for more information about the DHCP options and symbols.

DHCP network tables

DHCP network tables, which contain mappings of client IDs to IP addresses and parameters associated with those addresses. Network tables are named with the IP address of the network, and can be created, viewed, and modified using the pntadm command or dhcpmgr graphical utility. See dhcp_network(4) for more information about network tables.